Many belong to a special set, like Kaladesh Inventions and Amonkhet Invocations
Ravensburger will reveal the official rules soon, but did share some specifics, including: Each player will two unopened booster packs to start (either from the same set or mix-and-matched) Players will set aside the puzzle or marketing cards from their packs and shuffle the rest of the cards together without looking for them
Alela, Artful Provocateur Barracks of the Thousand Battery Bearer Biotransference Digsite Engineer Dr
The set will have over 64 cards before SR, SAR, UR, etc
The holos are quite hard to find, especially in good condition, but the most difficult are actually the non-holo rares, which account for the only six gaps remaining in my Registry set
It's often scalped and sold at ridiculous prices, and when it does become available, it sells out almost instantly